Which is more acidic phenol or picric?

(ii) O-amino phenol and m-amino phenol. (i) 2, 4, 6 trinitro phenol (picric acid) is stronger acid than 2, 4-dinitrophenol as it contains three electron withdrawing NO2 groups.

Which is more acidic para nitro phenol or phenol?

The decrease in electron density of the O – H bond of p-nitrophenol, the polarity of O – H bond decreases. The electron withdrawing group (-NO ), withdraws electrons and disperses the negative charge. Hence p-nitrophenol is more acidic than phenol.

Is para nitro phenol acidic?

The acidic nature of the three nitrophenols increases in the order: meta < ortho < para. Para-nitorophenol is the most acidic among the three. The nitro group attached to a conjugated system shows strong -M effect, and this decreases the electron density more at the ortho and para positions than at the meta position.

Which of the following is most acidic picric acid phenol ethyl alcohol para nitrophenol?

The p- Nitrophenol has one nitro group at para to phenol and Picric acid has three nitro groups at ortho and para positions to phenol. Thus, the picric acid is most acidic. So, it will have the least pKa value. After picric acid will be the para Nitrophenol and then phenol.

Which phenol is most acidic?

Hence, p-nitro phenol is most acidic among the given.

Why is 246 tri nitro phenol is more acidic than phenol?

Selina – Chemistry – Class 7 -M(mesomeric) and -I(inductive) effect. And NO2 shows both -M as well as -I effect… More the -m and -I molecules attach to phenol more wilk the acidic nature.

Is ortho or para more acidic?

Ortho nitrophenol is less acidic than para nitrophenol because of the intermolecular hydrogen bonding which makes the loss of proton very difficult. So, para nitrophenol is more acidic.

Why para nitro phenol is stronger acid than phenol and para cresol?

This can be explained as: A. – CH3 group decreases the electron density on the oxygen of O-H group making p-cresol a weaker acid. – NO2 decreases the electron density on the oxygen of O-H group making p-nitrophenol a stronger acid.

Which is more acidic phenol or methyl phenol?

Resonance in phenol: Phenol is less acidic as compared to the above two because no electron withdrawing group is present and there is no inductive or resonance effect. Methyl phenol shows the electron donating inductive effect, hence it is least acidic among the following.

Which phenol is the most acidic?

Which is more acidic ortho or para?

Why is picric acid more acidic than p-nitrophenol?

Picric acid is more acidic than p-nitrophenol due to greater electron withdrawing character of 3 nitro groups in ortho and para positions as compared to only one such group in p-nitrophenol.

What is the other name of picric acid?

Picric acid is also called 2, 4, 6 -tri nitro phenol . Picric acid is more stronger acid than phenol . Because picric acid contains three electron withdrawing nitro group on 2, 4, 6 position of carbon atoms . The nitro groups are also called deactivating group .

Why does phenol have an acidic proton?

Phenol has an acidic proton due to the stabilization of the phenoxide ion by resonance (see figure 1 below) or mesomeric effect. The negative charge on the phenoxide ion is delocalized into the benzene ring stabilizing it. This effect is common to m-nitrophenol too.

Which of the following phenol can attract electron from – OH group?

Now, among the o-nitro phenol, m-nitro phenol and p-nitro phenol, only o-nitro phenol and p-nitro phenol can attract electron from – OH group due to – R effect of –NO2 group.